Magnetic crustal features in the Vinchina basin. (July 2017)

• Record Type: Journal Article
• Authors: Weidmann, Cecilia; Ariza, Juan Pablo; Sánchez, Marcos; Gimenez, Mario; Christiansen, Rodolfo
• Is Part Of: Journal of South American earth sciences. Volume 76(2017:Jul.)
• Page Start: 94
• Page End: 100
• Publication Date: 2017-07
• Subjects: Aeromagnetic data -- Depth of Curie point -- Famatinian magmatic arc -- Western sierras pampeanas; Geology -- Latin America -- Periodicals; Earth sciences -- Latin America -- Periodicals; Geology -- Antarctica -- Periodicals; Earth sciences -- Antarctica -- Periodicals; Geology -- Caribbean Area -- Periodicals; Earth sciences -- Caribbean Area -- Periodicals; Géologie -- Amérique latine -- Périodiques; Sciences de la terre -- Amérique latine -- Périodiques; Géologie -- Antarctique -- Périodiques; Sciences de la terre -- Antarctique -- Périodiques; Géologie -- Caraïbes (Région) -- Périodiques; Sciences de la terre -- Caraïbes (Région) -- Périodiques; Earth sciences; Geology; Antarctica; Caribbean Area; Latin America; Periodicals; 550.5
• DOI: 10.1016/j.jsames.2017.02.015
• Languages: English
• ISSNs: 0895-9811

Abstract

Abstract: This research based on geological and geophysical data encompasses the South Central Andes region between 28 S and 31 S. We observed a region of high-magnetic susceptibility linked to sources located beneath the Vinchina basin through anomaly calculations and enhancing techniques using aerial and terrestrial magnetic data. The Curie Point Depth (CPD) obtained from the magnetic anomalies reflects a cold crust of approximately 50 km thick with CPD values of up to 40 km. These results are consistent with those obtained by other authors by means of mineral, isotopic, and thermo-chronological analysis in clay levels of the Vinchina basin sedimentary infill. Highlights: The depth of Curie point obtained from the magnetic anomalies. The magnetic anomaly map shows regions with positive values well-differentiated. An important positive anomaly can be observed; this anomaly surpasses the Vinchina basin, with the reduction to the pole. In the north the Tilt signal is disposed in W-E, changing it abruptly which can be due to the entrance of Copiapó ridge.